The eye of Saturn

Like a giant eye, the great vortex at the north pole of planet Saturn stares back at the Cassini spacecraft as Cassini stares at it.

Video: Colliding atmospheres of Mars and Comet Siding Spring

Martian auroras? Maybe a meteor shower? What Mars satellites might see when Comet Siding Spring sweeps super close to Mars this October.

Video: Rosetta’s race to map its comet

Last week, Rosetta became the first spacecraft ever to rendezvous with a comet. Now the spacecraft is in a race against time. Rosetta's next challenges, here.

Perseid meteors versus the supermoon

Which is brighter - Perseid fireballs or a supermoon? You'll find out as the year's biggest, brightest full moon arrives as Perseid meteor shower starts to peak.

Weak supernova might have left zombie star

Astronomers used Hubble Space Telescope images to spot a star system that could have left behind a "zombie star" after an unusually weak supernova explosion.

Astronomers watch as storms swirl on distant Uranus

Uranus - the sideways planet - has a weird spin and the strangest seasons of any of our solar system's planets. Astronomers called this week's storms "surprising."

Success! A final flawless burn. Rosetta now in tandem with its comet

Look here for a fascinating history in pictures and words of the Rosetta spacecraft's historic approach to Comet 67P/Churyumov–Gerasimenko.

Saturn kisses the dark edge of the moon

Astrophotographer Colin Legg in Western Australia caught the August 4, 2014 occultation of Saturn by the moon. He called it "a brilliant thing to watch."

For two weeks last August, all hell broke loose on Jupiter’s moon Io

The energy emitted by these volcanic eruptions implies lava fountains gushing at a huge volume per second, forming lava flows that quickly spread over Io's surface.

Zoom close to Mercury’s surface via MESSENGER spacecraft

You've got to see the movie made by the MESSENGER spacecraft in June 2014, when it began a series of close passes to the sun's innermost planet, Mercury.